{
  "manageEntity": {
    "action": "Save",
    "entityId": "1007831729",
    "entityType": "Track",
    "nonce": "0x7e0768698038eade6ff0714a28bfce1c25b0bb095475bc724b4c2a74218a3654",
    "signature": "0x7b17e849c1018edc96b303f74907149cb765e8ee6c86e6b6993e8f41ba25b0c45d995e12bd769e7010118f144d7cb706250dfc68a647faeff65274a3d15130501c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}